JPH0218740Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a seat cushion for a vehicle in which both the front part and the side support part of the seat cushion are movable up and down.

(Prior art) In vehicle seat cushions, side support sections are provided on both sides of the cushion main section in order to ensure that the seated occupant is held in place. It has its drawbacks. For this reason, there are seat cushions in which the main part of the cushion can be moved up and down relative to the side support part, but since the main part of the cushion is the part that supports the weight of the seated person, the mechanism is complicated and This is problematic in that it requires a large amount of force to operate.

(Purpose) In view of the above points, the present invention is a vehicle seat cushion in which the side support portion moves up and down, which has a simple mechanism and requires little force to operate, and which is also economical. The purpose of this cushion is to provide a seat cushion, and its features include a lower frame body that constitutes the main part of the seat cushion, and an upper frame body that constitutes the cushion front part and side support part of the seat cushion. The front upper frame body includes a front frame part that supports the front part of the cushion, a side support part, and both frame parts that support the front part, and the rear part of the upper frame body is rotatably supported by the rear part of the lower frame body. The cushion frame consisting of the lower frame body and the upper frame body is provided with an operating section, and by operating the operating section, the upper frame body is moved up and down with respect to the lower frame body.

(Example) The present invention will be described in detail below based on the illustrated example.

Figures 1 to 3 show a seat cushion according to an embodiment of the present invention, and reference numeral 1 in the figures indicates a lower frame body on the fixed side to which a cushion spring that supports the main part of the cushion is attached. , support holes 3 for the connecting rod 2 are provided on both sides of the front thereof, and plate cams 4 are fixed to both ends of the connecting rod 2, which is rotatably supported in the support holes 3. An operating knob 5 is attached to the outside of the cam (the plate cam on the right side in FIG. 2), and by rotating the operating knob 5, the plate cam 4 is operated.
Further, brackets 6 for attaching the upper frame body are integrally formed upright on both rear sides of the lower frame body 1, and the brackets 6 are provided with mounting holes 7 for pins 13.

Reference numeral 8 designates an upper frame body on the movable side, which is formed into a plane U shape having a front frame part 8a to which the front part 9 of the cushion is fixed, and frame parts 8b on both sides to which the side support parts 10 are fixed. The formed bracket 11 has a pin attachment hole 12 at the same position as in the lower frame body 1.
The upper frame body 8 is rotatably supported with respect to the lower frame body 1 via a pin 13 inserted through the hole.

In addition, in this supported state, the cam surfaces of the plate cams 4 mentioned above are in contact with the lower surfaces of both side frame portions 8b of the upper frame body 8, and when the reference surfaces of the plate cams 4 are in contact with the lower surfaces of the frame portions 8b on both sides of the upper frame body 8, the upper frame body 8
is configured to maintain a horizontal state with respect to the lower frame body 1.

Therefore, in this embodiment, the upper frame body 8
When the seated person turns the operation knob 5 while the seat is held in a horizontal position with respect to the lower frame body 1, the peaks of the plate cam 4 press against the lower surfaces of the frame portions 8b on both sides of the upper frame body 8, As a result of pushing up the front portion of the upper frame body 8 by the amount of the cam lift, the cushion front portion 9 and side support portions 10 are lifted to firmly hold the seated person.

When the operation knob 5 is further rotated when leaving the seat, the plate cam 4 also rotates and its reference plane supports the lower surface of the frame portions 8b on both sides, so that the cushion front portion 9 and the side support portions 10 is lowered so that it does not get in the way when getting on and off.
In the above-mentioned hold state, the front part of the upper frame body 8 is lifted up using the rear pivot part as a fulcrum, so the cushion main part 14 sinks with respect to the cushion front part 9 and the side support parts 10. This creates a comfortable seat.

4 and 5 show another embodiment of the operation section of the upper frame body in the present invention. In this embodiment, the operating rod 22 is mounted on a bracket in front of both side frame portions 28b of the upper frame body 28. 2
3, and is disposed parallel to both side frame portions 28b, and an inwardly directed lock pawl 24 is fixed to this operating rod 22. Both operating rods 22 are connected by a release wire 26, and are configured such that by rotating one, the other rotates in the opposite direction. Further, one operating rod 22 (the operating rod on the right side in the figure) extends forward and constitutes an operating lever 25,
By rotating the operating lever 25 outward, the lock pawl 24 escapes to the outside.

In the front side of the lower frame body 21, a plurality of lock holes 27 are formed in the vertical direction, with which the lock claws 24 engage, and in the rear side of the side, the front part of the upper frame body is tilted upward using the rear pivot part as a fulcrum. A return spring 29 is attached for rotation.

In this embodiment, the front portion of the upper frame body 28 is always urged by the return spring 29 to rotate upward. Therefore,
If the seated person, for example, rotates the operating lever 25 outward to remove the lock pawl 24 that is engaged with the lock hole 27 at the lowest level, the front part of the upper frame body 28 will tend to rotate upward. Therefore, when the operating lever 25 is returned to a desired rotational position and the lock claw 24 is engaged with the lock hole 27 at that position, the upper frame body 28 is supported at a predetermined angle with respect to the lower frame body 21. , the cushion front part 9 and side support parts 10 can be adjusted to desired heights with respect to the cushion main part 14.

According to this embodiment, the heights of the cushion front section 9 and the side support sections 10 can be adjusted in stages with respect to the cushion main section 14.

6 and 7 show still another embodiment of the operating section of the upper frame body of the present invention. In this embodiment, internal teeth 32a are provided in the front portions of both sides of the lower frame body 31 in the vertical direction. Rack 3 with
2 is fixed, while a bracket 33 is fixed in front of both side frame parts 38b of the upper frame body 38, and the connecting shaft 34 is rotatably supported by this bracket 33, and the internal teeth are attached to both ends of the connecting shaft 34. A gear 36 that meshes with the gear 32a is attached, and by rotating an operating knob 35 attached to the right end of the connecting shaft 34 in the figure, the meshing position between the gear 36 and the internal teeth 32a is adjusted. The operation knob 35 has a built-in ratchet lock mechanism, although detailed explanation thereof will be omitted.

Therefore, in this embodiment, when the seated person rotates the operation knob 35, the front part of the upper frame body 38 similarly rotates upward relative to the lower frame body 31 using the pivot portion as a fulcrum. It is something to do.

According to this embodiment, the rotation of the front portion of the upper frame body can be adjusted steplessly.

However, within the scope of this invention, without departing from its spirit,
Various design changes are possible, and the range of rotation of the upper frame body relative to the lower frame body may be set within a range that does not make the seated person feel uncomfortable in the seated state.

(Effects) As described above, according to the present invention, the front part of the upper frame body that supports the front part of the cushion and the side support part can be moved to the lower part by operating the operation part provided on the front part of the upper frame body. Since it rotates with respect to the frame body using the pivot as a fulcrum, the front part of the cushion and the side support part can be easily moved up and down with respect to the main part of the cushion, despite having a simple structure. Since the portion is sunken into the front portion of the cushion and the side support portion, a comfortable seat can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an overall external view of a vehicle seat cushion according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the main parts of the same cushion, and FIG. 3 is a sectional view of the same cushion seen from the front. Fig. 4 is an exploded perspective view of the main parts of a seat cushion according to another embodiment of the present invention, Fig. 5 is a perspective view of the main parts of the operating section of the same cushion, and Fig. 6 is a further embodiment of the present invention. FIG. 7 is an enlarged view of the main part of the operating section of the seat cushion. In the figure, symbols 1, 21, and 31 are lower frame bodies, 2
is a connecting rod, 4 is a plate cam, 5 and 35 are operation knobs,
6, 11, 23, 33 are brackets, 8, 28,
38 is an upper frame body, 8a is a front frame part, 8
b, 28b, 38b are frame parts on both sides, 9 is a front part of the cushion, 10 is a side support part, 14 is a cushion main part, 22 is an operating rod, 24 is a lock pawl, 25 is an operating lever, 26 is a release wire, 27 is a 29 is a return spring, 32 is a rack, 34 is a connecting shaft, and 36 is a gear.

Claims (1)

[Scope of utility model registration request] It has a lower frame body that constitutes the main part of the seat cushion, and an upper frame body that constitutes the cushion front part and side support part of the seat cushion, and the upper frame body has a front frame part that supports the front part of the cushion and a side support part. the upper frame body is rotatably supported by the rear part of the lower frame body, and an operation part is provided on the cushion frame consisting of the lower frame body and the upper frame body, A seat cushion for a vehicle, characterized in that an upper frame body can be moved up and down with respect to a lower frame body by operating an operating section.